Gradually add the milk mixture to dry ingredients and beat for 2 min at medium speed of mixer.

Add:

4 eggs (room temp)
1 cup flour

Beat at high speed on mixer for 2 more minutes. Stir in additional flour to make a soft dough.
Knead until smooth and elastic, about 8-10 min.

Place in greased bowl, turning it over to grease the dough.
Cover and let rise in warm, draft free place until double in size. (about 1 hour)

Combine:

2/3 cup sugar
3 tsp cinnamon

Punch dough down, turn out into a lightly floured bowl and divide in quarters.
Let rest a few minutes. Roll dough into a 12x8 inch rectangle.
Spray dough with water and sprinkle ¼ of the cinnamon sugar mixture on dough.
Fold dough over in 1/3 and then fold the other 1/3 over (as if folding paper for an envelope), press down to seal.
Seal edges firmly and tuck under dough and fit into the pan. Repeat with remaining dough.
Cover and let rise in warm place about 1 hour.

Bake in a 350 deg preheated oven for 30 minutes or until done (205 deg using a food thermometer).
Remove from pan and cool on wire rack. If desired, top with confectioner’s sugar frosting.